Means for locking antifriction bearings to shafts



Nov. 29, 1932. J, DUNHAM 1,889,064

MEANS FOR LOOKING ANTIERICTION BEARINGS T0 SHAFTS Filed Aug. 28, 1931 2 Sheets-Sheet 1 John FL. Dun/ham Nov. 29, 1932. J. R. DUNHAM 1,889,064

MEANS FOR LOOKING ANTIFRICTION BEARINGS TO SHAF'TS Filed Aug. 28, 1931 2 Sheets-Sheet 2 g glnucwfoc 4 I g I JbhnR.D /nham 1 1 Cutozueq 40, Eurther,1t1s

carry a rotatable locking pin Patented Nov. 29, 1932 Jomr an nuimnm, orjimw nnunswrck, new ar sen! nuns-non. Looms anrmnrc'iron :enanmes To ensure Application filed August 28, 1931. serial in. 560,028.-

My invention, relates to anti-friction bearings which usually comprise an inner race and an outer race between which suitable antifriction elements such as. balls or rollers are 5 located, and the invention especially has relation to means for locking the inner race to the shaft or spindle on which it is to be fixed.

Primarily, the invention has for its object to provide' a simple, effective means for securely holding'or locking the bearing at a definlte locationon a shaft or spindle without the use of keys, nuts, or set screws between the shaft and the bearingitself, whereby the hearing will be' held .not only against longitudinal movement on the shaft but will also T be kept from rotatin on the same. Considerable difiiculty has een heretofore encountered to securely hold or look a ball or other anti-friction bearingin a certain location on a shaft. Several methodshave'been resorted to in an endeavor to solve this problem. Few,

have succeeded. Others have failed to answer the purpose, some on account of the high cost of manufacture and others because of 1 26 their impracticability.

of the inner race of an anti-friction bearing to rotate upon the shaft on which it is mount; ed,.and it is an object ofmy invention to com-3 bine an anti-friction bearing with a very sim- 30 ple and substantial mechanism for locking the bearing to a shaft in order to prevent rotation of the bearing on the shaft and also to prevent its creeping along the shaft.

Further, it is an ob ect to provide a device for the purposes stated which employs a locking pin whose axis parallels that of the shaft,

" a so that it '1 bearing against rotation while effecting the locking act.

becomes unnecessary to hold the an object to provide a lock- 7 i collar w of cylindrical form having a roughened (knurled or toothed) portion to engage with:

\ a similarly roughened portion of the bearing 5. element, one or the other of the roughened There is a tendency "ture showninFigure 3.

portions being eccentric to its axis of rotation, whereby rotating the'locking'pin will eflect relative rotatioribetwen the bearing element and the locking collar to cause them tightly to grasp the shaft. g Other objects will inpart be obvious and in part be pointed out hereinafter. v To the-attainment of the aforesaid objects and ends, the invention still further resides in the novel details of construction,"combination and arrangement of parts,'all of which will be first fully described in the'following detailed description, then be particularly olnted out in the appended claims, reference ein had to the accompanying drawings inw'cht Figure 1 is an elevation of one embodiment of my invention. 1

Figure 2 isa cross section on the line 2-2 of Figure 1-. I j

Figure 3 is a vertical, longitudinal section of the parts shown in Figure 1 on an enlarged sca c.

Figure 4 is a detail of a portion of the strucv Figure 5 is' part elevation and part longitudinal section illustrating a modification of theinvention.

' Figure 6 is a side elevation and part lonitudinal section illustrating another modi- %cati0n of the invention.

Figure 7- is a detail view, partly n section and partly in elevation of a third modification of the invention. 7

' In the drawings in which like numerals of reference indicate likep'arts in all of the. fig- I ures,- 1 re resents the shaft, 2 the inner element of the ball bearin'g,.which.element has the race-way 3, and is provided with an extensioncollar 4 and a roughened portion 5. 6-represents the locking collar whichis recessed at 10 to fit over the portion 5 of the element 2- and which is bored at 7 parallelly to the shaft bore of the collar to receive rotatably, the locking pin 11. The locking pin 11 is preferably held against longitudinal movement in the bore 7 by upset portions 16 land 17' produced by the use of circular or arcuate punches, which upset portions overlie the chamfered ends 13 and it of the locking pin; The locking pin also has a roughened portion 12 to mesh with the portion 5. It is further provided with a wrench socket 15 into which a wrench may be inserted for the purpose of turning the locking pin around, causing it toroll around the surface 5.

Que or the other of the roughened, knurled or toothed surfaces, 5, 12, is formed eccentric to its axis of rotation. For convenience of illustration, and as a preferable construction, the surface 5is formed eccentric to the axis of the element 2, while the surface 12 is formed concentric to the axis of the pin.

If it is desired, a set screw '9 may be provided in a threaded bore of the collar 6 to hold the collar against turning on the shaft 1, but if the pin 11 is turned far enough and a tight binding is elilected, the use of the set screw usually is unnecessary, itbeing provided merely as a precautionary measure.

The roughened portions may be straight, out parallel to the axis of the rotation of the :elements, as shown in Fig. l, or they may be spirally out as shown in Figure 7, In that figure corresponding parts to those parts shown in Figures 1-4:, inclusive, bear the same reference numbers plus the index letter 0, so a detailed description of Figure 7 is thought to be unnecessary here,

The roughened (knurled or toothed) surfaces may be formed on the cylindrical portions of the elements, Figure l. or on ilrustoconical portions, as shown in Figure '5, or on convex and concave portions, as shown in Figure 6. y

In Figure 5 the parts corresponding to similar parts in Figure 1 bear the same reference numerals plus the'index letter a, while in Figure 6 the same reference'numbers plus the letter Z are used.

In the modification shown in Figure 6 I prefer to provide the element 25 with an annular groove 18 betweenthe collar part 47) and the roughened part 515," so as to receive the rung-like portion 19 of the loclringv pin,

thereby assisting in holding the locking col-v lar and the bearing element against endwise separation without depending entirely on the inter-engaging surfaces 56 and 125.

It will be seen that in assembling the parts a the locking pin is slip'ped over the roughened portion of the bearing element at the most eccentric place and then a slight turning" movement of the locking 'collar on the bearing element is given, sufiicien't to bring the roughened surfaces into engagement, ,Then by turning the locking pin with a wrench it will cause the locking collar to turn around the bearing element and, at the same time, the locking pin climbs up the angle or the ec= aaeaoee centric portion with great power and exerts the necessaryforce to cause the locking collar and the bearing element tightly to grip the shaft 1. i

In order that end play or movement may be taken out of the bearings when tapered tightened up, after which the locking pin is again tightened to hold the bearing member ri 'd.

I rom the foregoing description, taken in connection with the accompanying drawings, it is thought the complete construction, operation and advantages of my invention will be clear to those skilled in the art to which it relates.

What I claim is:

1. In apparatus wherein is provided a shaft and an element to be secured thereon;

a locking collar, said element and said collar being fitted on said shaft with a sliding fit, and a locking pin mounted in said collar with its axis paralleling that of the collar,

said element and said locking pin having locking pin rotatably held in said collar with its axis paralleling that of the collar, said element having an eccentric portion whose perimeter is roughened, and-said pin having a concentric portion whose perimeter 1s roughened and engages with said eccentric roughened portion, and means distinct from said collar and said element for turning said pin in said collar for the purposes described 3. In, apparatus wherein is provided a shaft and an element to be secured thereon; a locking collar, said elementand said collar being fitted on said shaft with a sliding fit, and a locking pin rotatably held in said collar with its axis paralleling thatof the collar, said element having an eccentric portion whose perimeter is roughened, and said pin having a concentric portion whose perimeter is roughened and engages with said eccentric roughened portion, said roughened portions comprising intermeshing teeth and means distinct from said collar and said element for turning said in in said collar for the purposes describe t. In apparatus wherein is provided a shaft r and a locking pin rotatably held in said collar and an elementltobe' secured thereon; a locking collar, said'element and'said collar being fitted on said shaft with a-sliding fit,

with its axis paralleling that of the collar, said element having an eccentric portion whose, perimeter is roughened, and said pin having a concentric portion whose perimeter is roughened and engages with said eccentric roughened portion, said roughened portions lying parallel to the axes of the elementson which they are formed and means distinct from said collar and said element for turning said pin in said collar for-the purposes described. 1

' 5. In apparatus whereinis provided a shaft and an element to ing collar, said element and said collar being fitted on said shaft with a sliding fit, and a locking pin mounted in said collar with its axis paralleling that of the collar, said element having an eccentric portion whose perimeter is roughened, and said pin having a concentric portion whose perimeter is roughand an element to be secured'thereon;

ened and engages with said eccentric roughened portion, said roughened portions comprising intermeshing teeth which lie par? allel to the axes of the elements on which they are formed. p i N 6. ln apparatus wherein is provided a shaft a looking collar, said element and said collar heing fitted on said shaft with a sliding fit,and a locking pin mounted in said collar with its axis paralleling that of the collar, said element having an eccentric portion whose perimeter is roughened, and said pin having a concentric portion'whose perimeter is roughened and engages with said eccentric roughened portion, said roughened portions comprising spirally cut, meshing, toothlike portions. y l v 7. In apparatus wherein isprovided a shaft and an element to be secured thereon; a locking collar, said element and said collar heing fitted on said shattwith a sliding fit, and a locking pin mounted in said collar with its axis paralleling that of thecollar, said element and said locking pin having roughened engaging portions, one of which is eccentric to the axis of rotation of its member, and

ineans in virtue of whichsaid'pin may he turned to efi'ect relative rotation between the collar and the element for the purposes described, one of said roughened portions being convex while the other is correspondingly concave when viewed in the central, vertical, longitudinal section or the device.

8. ln apparatus wherein is provided a shaft and an element to besecured thereon; a looking collar, said element and said collar being fitted on said shaft with a sliding fit, and a locking pin mounted in said collar witl'iits axis paralleling that of the collar, said element and sa d locking pin having roughened ens be secured thereon; a lockgaging portions, one of which is eccentric to the axis of rotation of its member, and means in virtue of which said pin may be turned to effect relative rotation between the collar and the element for the purposes described, one of said roughened portions being convex while the other is correspondingly concave whenviewed in the central, vertical, longitudinal section of the device, said element and said pin also having ring and groove interlocking portions for the purposes specified.

. 9. In apparatus wherein is provided a shaft and an element to be securedthereon; a looking collar,said element and said collar being fitted on said shaftwith a sliding fit and alocking pin mounted in said collar with its axis paralleling that of the collar, said element and said locking pin having roughened engaging portions, one of which is eccentric to the'axis otrotation of its member, and means in virtue lofwhich said pin may-he turned to eflect relative rbtation between the collar and the element for the purposes described, said locking pin having its 90 with" said chamtered ends chanifered and said collar having upset portions cooperating ends to hold the pin against longitudinal movement in the collar l0. lln apparatus wherein is pnmiided a shaft and an element to he secured thereon; a locking collar, said element and said collar heing fitted on said shattwith asliding fit, and a locking pin mounted in said collar withits axis paralleling that'ot the collar, said element and said locking pin having eccentric to the axis of rotation of its memher, and means in may he turned to edectrelative carried by said locking collar to engage said roughened engaging portions, one of which is virtue of which said in. V rotation e-l. tween the collar and the element, 'andmeans A,

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element for talring up endplay, torthe purQ poses described.

ll. lln apparatus wherein is provided a shaft and an element to be secured thereon;

a locking collar, said element and said collar losing fitted on said shaft with a sliding tit, and a locking pin mounted in'said collar with its axisparallelin that of the collar, saideleone of which is eccentric shaft and an element to be secured thereon;

a locking collar, a set screw for securing said collar to said shaft, said element having an steeaoea end abutting said collar, adjustment screws on said collar to engage said abutting end to vary the distance between said element and said collar, a locking pin carried by said coll lar, said locking pin and said element having cooperating'parts whereby upon rotation of said locking pin said collar and said element will thereby be locked against movement on the shaft.

JOHN RYER DUNK-1AM 

